Variations on cosmology and astrophysics

Axions in Astrophysics and Cosmology*

High-Energy Astrophysics and Cosmology

Interfaces between high-energy physics, astrophysics and cosmology are reviewed, with particular emphasis on the important roles played by high-energy cosmic-ray physics. These include the understanding of atmospheric neutrinos, the search for massive cold dark matter particles and possible tests of models of quantum gravity. In return, experiments at the LHC may be useful for refining models o...

Variations on Kaluza-klein Cosmology

We investigate the cosmological consequences of having quantum fields living in a space with compactified dimensions. We will show that the equation of state is not modified by topological effects and so the dynamics of the universe remains as it is in the infinite volume limit. On the contrary the thermal history of the universe depends on terms that are associated with having non-trivial topo...

Chaotic Phenomena in Astrophysics and Cosmology

Chaos is a typical property of many-dimensional nonlinear systems. Its role it revealed in various problems of astrophysics and cosmology. Chaos made to revise the two-hundred year old views on the evolution of Solar system. Theory of interstellar matter, dynamics of star clusters and galaxies at present cannot be considered without chaotic effects. Astronomical topics themselves had remarkable...

Physics, Astrophysics and Cosmology with Gravitational Waves

Gravitational wave detectors are already operating at interesting sensitivity levels, and they have an upgrade path that should result in secure detections by 2014. We review the physics of gravitational waves, how they interact with detectors (bars and interferometers), and how these detectors operate. We study the most likely sources of gravitational waves and review the data analysis methods...